GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2015 Varnish Software AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#include "config.h"

#include <stdlib.h>

#include "cache_varnishd.h"
#include "cache_filter.h"
#include "cache_objhead.h"
#include "cache_transport.h"

#include "vtim.h"
#include "storage/storage.h"

/*----------------------------------------------------------------------
 * Pull the req.body in via/into a objcore
 *
 * This can be called only once per request
 *
 */

static ssize_t
vrb_pull(struct req *req, ssize_t maxsize, objiterate_f *func, void *priv)
{
        ssize_t l, r = 0, yet;
        struct vrt_ctx ctx[1];
        struct vfp_ctx *vfc;
        uint8_t *ptr;
        enum vfp_status vfps = VFP_ERROR;
        const struct stevedore *stv;
        ssize_t req_bodybytes = 0;
        unsigned flush = OBJ_ITER_FLUSH;

        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);

        CHECK_OBJ_NOTNULL(req->htc, HTTP_CONN_MAGIC);
        CHECK_OBJ_NOTNULL(req->vfc, VFP_CTX_MAGIC);
        vfc = req->vfc;

        req->body_oc = HSH_Private(req->wrk);
        AN(req->body_oc);

        if (req->storage != NULL)
                stv = req->storage;
        else
                stv = stv_transient;

        req->storage = NULL;

        if (STV_NewObject(req->wrk, req->body_oc, stv, 0) == 0) {
                req->req_body_status = BS_ERROR;
                HSH_DerefBoc(req->wrk, req->body_oc);
                AZ(HSH_DerefObjCore(req->wrk, &req->body_oc, 0));
                (void)VFP_Error(vfc, "Object allocation failed:"
                    " Ran out of space in %s", stv->vclname);
                return (-1);
        }

        vfc->oc = req->body_oc;

        INIT_OBJ(ctx, VRT_CTX_MAGIC);
        VCL_Req2Ctx(ctx, req);

        if (req->vfp_filter_list != NULL &&
            VCL_StackVFP(vfc, req->vcl, req->vfp_filter_list)) {
                (void)VFP_Error(vfc, "req.body filters failed");
                req->req_body_status = BS_ERROR;
                HSH_DerefBoc(req->wrk, req->body_oc);
                AZ(HSH_DerefObjCore(req->wrk, &req->body_oc, 0));
                return (-1);
        }


        if (VFP_Open(ctx, vfc) < 0) {
                req->req_body_status = BS_ERROR;
                HSH_DerefBoc(req->wrk, req->body_oc);
                AZ(HSH_DerefObjCore(req->wrk, &req->body_oc, 0));
                return (-1);
        }

        AN(req->htc);
        yet = req->htc->content_length;
        if (yet != 0 && req->want100cont) {
                req->want100cont = 0;
                (void)req->transport->minimal_response(req, 100);
        }
        yet = vmax_t(ssize_t, yet, 0);
        do {
                AZ(vfc->failed);
                if (maxsize >= 0 && req_bodybytes > maxsize) {
                        (void)VFP_Error(vfc, "Request body too big to cache");
                        break;
                }
                /* NB: only attempt a full allocation when caching. */
                l = maxsize > 0 ? yet : 0;
                if (VFP_GetStorage(vfc, &l, &ptr) != VFP_OK)
                        break;
                AZ(vfc->failed);
                AN(ptr);
                AN(l);
                vfps = VFP_Suck(vfc, ptr, &l);
                if (l > 0 && vfps != VFP_ERROR) {
                        req_bodybytes += l;
                        if (yet >= l)
                                yet -= l;
                        else if (yet > 0)
                                yet = 0;
                        if (func != NULL) {
                                if (vfps == VFP_END)
                                        flush |= OBJ_ITER_END;
                                r = func(priv, flush, ptr, l);
                                if (r)
                                        break;
                        } else {
                                ObjExtend(req->wrk, req->body_oc, l,
                                    vfps == VFP_END ? 1 : 0);
                        }
                }

        } while (vfps == VFP_OK);
        req->acct.req_bodybytes += VFP_Close(vfc);
        VSLb_ts_req(req, "ReqBody", VTIM_real());
        if (func != NULL) {
                HSH_DerefBoc(req->wrk, req->body_oc);
                AZ(HSH_DerefObjCore(req->wrk, &req->body_oc, 0));
                if (vfps == VFP_END && r == 0 && (flush & OBJ_ITER_END) == 0)
                        r = func(priv, flush | OBJ_ITER_END, NULL, 0);
                if (vfps != VFP_END) {
                        req->req_body_status = BS_ERROR;
                        if (r == 0)
                                r = -1;
                }
                return (r);
        }

        AZ(ObjSetU64(req->wrk, req->body_oc, OA_LEN, req_bodybytes));
        HSH_DerefBoc(req->wrk, req->body_oc);

        if (vfps != VFP_END) {
                req->req_body_status = BS_ERROR;
                AZ(HSH_DerefObjCore(req->wrk, &req->body_oc, 0));
                return (-1);
        }

        assert(req_bodybytes >= 0);
        if (req_bodybytes != req->htc->content_length) {
                /* We must update also the "pristine" req.* copy */
                http_Unset(req->http0, H_Content_Length);
                http_Unset(req->http0, H_Transfer_Encoding);
                http_PrintfHeader(req->http0, "Content-Length: %ju",
                    (uintmax_t)req_bodybytes);

                http_Unset(req->http, H_Content_Length);
                http_Unset(req->http, H_Transfer_Encoding);
                http_PrintfHeader(req->http, "Content-Length: %ju",
                    (uintmax_t)req_bodybytes);
        }

        req->req_body_status = BS_CACHED;
        return (req_bodybytes);
}

/*----------------------------------------------------------------------
 * Iterate over the req.body.
 *
 * This can be done exactly once if uncached, and multiple times if the
 * req.body is cached.
 *
 * return length or -1 on error
 */

ssize_t
VRB_Iterate(struct worker *wrk, struct vsl_log *vsl,
    struct req *req, objiterate_f *func, void *priv)
{
        int i;

        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
        AN(func);

        if (req->req_body_status == BS_CACHED) {
                AN(req->body_oc);
                if (ObjIterate(wrk, req->body_oc, priv, func, 0))
                        return (-1);
                return (0);
        }
        if (req->req_body_status == BS_NONE)
                return (0);
        if (req->req_body_status == BS_TAKEN) {
                VSLb(vsl, SLT_VCL_Error,
                    "Uncached req.body can only be consumed once.");
                return (-1);
        }
        if (req->req_body_status == BS_ERROR) {
                VSLb(vsl, SLT_FetchError,
                    "Had failed reading req.body before.");
                return (-1);
        }
        Lck_Lock(&req->sp->mtx);
        if (req->req_body_status->avail > 0) {
                req->req_body_status = BS_TAKEN;
                i = 0;
        } else
                i = -1;
        Lck_Unlock(&req->sp->mtx);
        if (i) {
                VSLb(vsl, SLT_VCL_Error,
                    "Multiple attempts to access non-cached req.body");
                return (i);
        }
        return (vrb_pull(req, -1, func, priv));
}

/*----------------------------------------------------------------------
 * VRB_Ignore() is a dedicated function, because we might
 * be able to dissuade or terminate its transmission in some protocols.
 *
 * For HTTP1, we do nothing if we are going to close the connection anyway or
 * just iterate it into oblivion.
 */

static int v_matchproto_(objiterate_f)
httpq_req_body_discard(void *priv, unsigned flush, const void *ptr, ssize_t len)
{

        (void)priv;
        (void)flush;
        (void)ptr;
        (void)len;
        return (0);
}

int
VRB_Ignore(struct req *req)
{

        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);

        if (req->doclose != SC_NULL)
                return (0);
        if (req->req_body_status->avail > 0)
                (void)VRB_Iterate(req->wrk, req->vsl, req,
                    httpq_req_body_discard, NULL);
        if (req->req_body_status == BS_ERROR)
                req->doclose = SC_RX_BODY;
        return (0);
}

/*----------------------------------------------------------------------
 */

void
VRB_Free(struct req *req)
{
        int r;

        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);

        if (req->body_oc == NULL)
                return;

        r = HSH_DerefObjCore(req->wrk, &req->body_oc, 0);

        // each busyobj may have gained a reference
        assert (r >= 0);
        assert ((unsigned)r <= req->restarts + 1);
}

/*----------------------------------------------------------------------
 * Cache the req.body if it is smaller than the given size
 *
 * This function must be called before any backend fetches are kicked
 * off to prevent parallelism.
 */

ssize_t
VRB_Cache(struct req *req, ssize_t maxsize)
{
        uint64_t u;

        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
        assert (req->req_step == R_STP_RECV);
        assert(maxsize >= 0);

        /*
         * We only allow caching to happen the first time through vcl_recv{}
         * where we know we will have no competition or conflicts for the
         * updates to req.http.* etc.
         */
        if (req->restarts > 0 && req->req_body_status != BS_CACHED) {
                VSLb(req->vsl, SLT_VCL_Error,
                    "req.body must be cached before restarts");
                return (-1);
        }

        if (req->req_body_status == BS_CACHED) {
                AZ(ObjGetU64(req->wrk, req->body_oc, OA_LEN, &u));
                return (u);
        }

        if (req->req_body_status->avail <= 0)
                return (req->req_body_status->avail);

        if (req->htc->content_length > maxsize) {
                req->req_body_status = BS_ERROR;
                (void)VFP_Error(req->vfc, "Request body too big to cache");
                return (-1);
        }

        return (vrb_pull(req, maxsize, NULL, NULL));
}

		varnish-cache/bin/varnishd/cache/cache_req_body.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2015 Varnish Software AS
3		* All rights reserved.
4		*
5		* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
6		*
7		* SPDX-License-Identifier: BSD-2-Clause
8		*
9		* Redistribution and use in source and binary forms, with or without
10		* modification, are permitted provided that the following conditions
11		* are met:
12		* 1. Redistributions of source code must retain the above copyright
13		* notice, this list of conditions and the following disclaimer.
14		* 2. Redistributions in binary form must reproduce the above copyright
15		* notice, this list of conditions and the following disclaimer in the
16		* documentation and/or other materials provided with the distribution.
17		*
18		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
22		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28		* SUCH DAMAGE.
29		*
30		*/
31
32		#include "config.h"
33
34		#include <stdlib.h>
35
36		#include "cache_varnishd.h"
37		#include "cache_filter.h"
38		#include "cache_objhead.h"
39		#include "cache_transport.h"
40
41		#include "vtim.h"
42		#include "storage/storage.h"
43
44		/*----------------------------------------------------------------------
45		* Pull the req.body in via/into a objcore
46		*
47		* This can be called only once per request
48		*
49		*/
50
51		static ssize_t
52	4120	vrb_pull(struct req req, ssize_t maxsize, objiterate_f func, void *priv)
53		{
54	4120	ssize_t l, r = 0, yet;
55		struct vrt_ctx ctx[1];
56		struct vfp_ctx *vfc;
57		uint8_t *ptr;
58	4120	enum vfp_status vfps = VFP_ERROR;
59		const struct stevedore *stv;
60	4120	ssize_t req_bodybytes = 0;
61	4120	unsigned flush = OBJ_ITER_FLUSH;
62
63	4120	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
64
65	4120	CHECK_OBJ_NOTNULL(req->htc, HTTP_CONN_MAGIC);
66	4120	CHECK_OBJ_NOTNULL(req->vfc, VFP_CTX_MAGIC);
67	4120	vfc = req->vfc;
68
69	4120	req->body_oc = HSH_Private(req->wrk);
70	4120	AN(req->body_oc);
71
72	4120	if (req->storage != NULL)
73	200	stv = req->storage;
74		else
75	3920	stv = stv_transient;
76
77	4120	req->storage = NULL;
78
79	4120	if (STV_NewObject(req->wrk, req->body_oc, stv, 0) == 0) {
80	40	req->req_body_status = BS_ERROR;
81	40	HSH_DerefBoc(req->wrk, req->body_oc);
82	40	AZ(HSH_DerefObjCore(req->wrk, &req->body_oc, 0));
83	80	(void)VFP_Error(vfc, "Object allocation failed:"
84	40	" Ran out of space in %s", stv->vclname);
85	40	return (-1);
86		}
87
88	4080	vfc->oc = req->body_oc;
89
90	4080	INIT_OBJ(ctx, VRT_CTX_MAGIC);
91	4080	VCL_Req2Ctx(ctx, req);
92
93	4080	if (req->vfp_filter_list != NULL &&
94	320	VCL_StackVFP(vfc, req->vcl, req->vfp_filter_list)) {
95	0	(void)VFP_Error(vfc, "req.body filters failed");
96	0	req->req_body_status = BS_ERROR;
97	0	HSH_DerefBoc(req->wrk, req->body_oc);
98	0	AZ(HSH_DerefObjCore(req->wrk, &req->body_oc, 0));
99	0	return (-1);
100		}
101
102
103	4080	if (VFP_Open(ctx, vfc) < 0) {
104	0	req->req_body_status = BS_ERROR;
105	0	HSH_DerefBoc(req->wrk, req->body_oc);
106	0	AZ(HSH_DerefObjCore(req->wrk, &req->body_oc, 0));
107	0	return (-1);
108		}
109
110	4080	AN(req->htc);
111	4080	yet = req->htc->content_length;
112	4080	if (yet != 0 && req->want100cont) {
113	120	req->want100cont = 0;
114	120	(void)req->transport->minimal_response(req, 100);
115	120	}
116	4080	yet = vmax_t(ssize_t, yet, 0);
117	4080	do {
118	6890	AZ(vfc->failed);
119	6890	if (maxsize >= 0 && req_bodybytes > maxsize) {
120	40	(void)VFP_Error(vfc, "Request body too big to cache");
121	40	break;
122		}
123		/* NB: only attempt a full allocation when caching. */
124	6850	l = maxsize > 0 ? yet : 0;
125	6850	if (VFP_GetStorage(vfc, &l, &ptr) != VFP_OK)
126	0	break;
127	6850	AZ(vfc->failed);
128	6850	AN(ptr);
129	6850	AN(l);
130	6850	vfps = VFP_Suck(vfc, ptr, &l);
131	6850	if (l > 0 && vfps != VFP_ERROR) {
132	5731	req_bodybytes += l;
133	5731	if (yet >= l)
134	4366	yet -= l;
135	1365	else if (yet > 0)
136	0	yet = 0;
137	5731	if (func != NULL) {
138	4081	if (vfps == VFP_END)
139	2161	flush \|= OBJ_ITER_END;
140	4081	r = func(priv, flush, ptr, l);
141	4081	if (r)
142	0	break;
143	4081	} else {
144	3300	ObjExtend(req->wrk, req->body_oc, l,
145	1650	vfps == VFP_END ? 1 : 0);
146		}
147	5731	}
148
149	6850	} while (vfps == VFP_OK);
150	4080	req->acct.req_bodybytes += VFP_Close(vfc);
151	4080	VSLb_ts_req(req, "ReqBody", VTIM_real());
152	4080	if (func != NULL) {
153	3080	HSH_DerefBoc(req->wrk, req->body_oc);
154	3080	AZ(HSH_DerefObjCore(req->wrk, &req->body_oc, 0));
155	3080	if (vfps == VFP_END && r == 0 && (flush & OBJ_ITER_END) == 0)
156	274	r = func(priv, flush \| OBJ_ITER_END, NULL, 0);
157	3080	if (vfps != VFP_END) {
158	645	req->req_body_status = BS_ERROR;
159	645	if (r == 0)
160	645	r = -1;
161	645	}
162	3080	return (r);
163		}
164
165	1000	AZ(ObjSetU64(req->wrk, req->body_oc, OA_LEN, req_bodybytes));
166	1000	HSH_DerefBoc(req->wrk, req->body_oc);
167
168	1000	if (vfps != VFP_END) {
169	80	req->req_body_status = BS_ERROR;
170	80	AZ(HSH_DerefObjCore(req->wrk, &req->body_oc, 0));
171	80	return (-1);
172		}
173
174	920	assert(req_bodybytes >= 0);
175	920	if (req_bodybytes != req->htc->content_length) {
176		/* We must update also the "pristine" req.* copy */
177	160	http_Unset(req->http0, H_Content_Length);
178	160	http_Unset(req->http0, H_Transfer_Encoding);
179	320	http_PrintfHeader(req->http0, "Content-Length: %ju",
180	160	(uintmax_t)req_bodybytes);
181
182	160	http_Unset(req->http, H_Content_Length);
183	160	http_Unset(req->http, H_Transfer_Encoding);
184	320	http_PrintfHeader(req->http, "Content-Length: %ju",
185	160	(uintmax_t)req_bodybytes);
186	160	}
187
188	920	req->req_body_status = BS_CACHED;
189	920	return (req_bodybytes);
190	4120	}
191
192		/*----------------------------------------------------------------------
193		* Iterate over the req.body.
194		*
195		* This can be done exactly once if uncached, and multiple times if the
196		* req.body is cached.
197		*
198		* return length or -1 on error
199		*/
200
201		ssize_t
202	4040	VRB_Iterate(struct worker wrk, struct vsl_log vsl,
203		struct req req, objiterate_f func, void *priv)
204		{
205		int i;
206
207	4040	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
208	4040	AN(func);
209
210	4040	if (req->req_body_status == BS_CACHED) {
211	960	AN(req->body_oc);
212	960	if (ObjIterate(wrk, req->body_oc, priv, func, 0))
213	0	return (-1);
214	960	return (0);
215		}
216	3080	if (req->req_body_status == BS_NONE)
217	0	return (0);
218	3080	if (req->req_body_status == BS_TAKEN) {
219	0	VSLb(vsl, SLT_VCL_Error,
220		"Uncached req.body can only be consumed once.");
221	0	return (-1);
222		}
223	3080	if (req->req_body_status == BS_ERROR) {
224	0	VSLb(vsl, SLT_FetchError,
225		"Had failed reading req.body before.");
226	0	return (-1);
227		}
228	3080	Lck_Lock(&req->sp->mtx);
229	3080	if (req->req_body_status->avail > 0) {
230	3080	req->req_body_status = BS_TAKEN;
231	3080	i = 0;
232	3080	} else
233	0	i = -1;
234	3080	Lck_Unlock(&req->sp->mtx);
235	3080	if (i) {
236	0	VSLb(vsl, SLT_VCL_Error,
237		"Multiple attempts to access non-cached req.body");
238	0	return (i);
239		}
240	3080	return (vrb_pull(req, -1, func, priv));
241	4040	}
242
243		/*----------------------------------------------------------------------
244		* VRB_Ignore() is a dedicated function, because we might
245		* be able to dissuade or terminate its transmission in some protocols.
246		*
247		* For HTTP1, we do nothing if we are going to close the connection anyway or
248		* just iterate it into oblivion.
249		*/
250
251		static int v_matchproto_(objiterate_f)
252	2155	httpq_req_body_discard(void priv, unsigned flush, const void ptr, ssize_t len)
253		{
254
255	2155	(void)priv;
256	2155	(void)flush;
257	2155	(void)ptr;
258	2155	(void)len;
259	2155	return (0);
260		}
261
262		int
263	148305	VRB_Ignore(struct req *req)
264		{
265
266	148305	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
267
268	148305	if (req->doclose != SC_NULL)
269	9824	return (0);
270	138481	if (req->req_body_status->avail > 0)
271	1840	(void)VRB_Iterate(req->wrk, req->vsl, req,
272		httpq_req_body_discard, NULL);
273	138481	if (req->req_body_status == BS_ERROR)
274	205	req->doclose = SC_RX_BODY;
275	138481	return (0);
276	148305	}
277
278		/*----------------------------------------------------------------------
279		*/
280
281		void
282	143577	VRB_Free(struct req *req)
283		{
284		int r;
285
286	143577	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
287
288	143577	if (req->body_oc == NULL)
289	142657	return;
290
291	920	r = HSH_DerefObjCore(req->wrk, &req->body_oc, 0);
292
293		// each busyobj may have gained a reference
294	920	assert (r >= 0);
295	920	assert ((unsigned)r <= req->restarts + 1);
296	143577	}
297
298		/*----------------------------------------------------------------------
299		* Cache the req.body if it is smaller than the given size
300		*
301		* This function must be called before any backend fetches are kicked
302		* off to prevent parallelism.
303		*/
304
305		ssize_t
306	1360	VRB_Cache(struct req *req, ssize_t maxsize)
307		{
308		uint64_t u;
309
310	1360	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
311	1360	assert (req->req_step == R_STP_RECV);
312	1360	assert(maxsize >= 0);
313
314		/*
315		* We only allow caching to happen the first time through vcl_recv{}
316		* where we know we will have no competition or conflicts for the
317		* updates to req.http.* etc.
318		*/
319	1360	if (req->restarts > 0 && req->req_body_status != BS_CACHED) {
320	0	VSLb(req->vsl, SLT_VCL_Error,
321		"req.body must be cached before restarts");
322	0	return (-1);
323		}
324
325	1360	if (req->req_body_status == BS_CACHED) {
326	120	AZ(ObjGetU64(req->wrk, req->body_oc, OA_LEN, &u));
327	120	return (u);
328		}
329
330	1240	if (req->req_body_status->avail <= 0)
331	160	return (req->req_body_status->avail);
332
333	1080	if (req->htc->content_length > maxsize) {
334	40	req->req_body_status = BS_ERROR;
335	40	(void)VFP_Error(req->vfc, "Request body too big to cache");
336	40	return (-1);
337		}
338
339	1040	return (vrb_pull(req, maxsize, NULL, NULL));
340	1360	}